Then using Chrome with Selenium to run acceptance tests, the
browser displays message about being controlled by selenium:

Chrome is being controlled by automated testing
software.

The message is pretty annoying, fortunately it can be removed by
proper acceptance.suite.yml configuration directive.
The key is WebDriver's capabilitieschromeOptionsargs value. A bit deeply
hidden, the required argument
is --disable-infobars.

Example Configuration

The one example might be easier to understand that the
description, so here it is: